/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jasper.tagplugins.jstl.core;

import org.apache.jasper.compiler.tagplugin.TagPlugin;
import org.apache.jasper.compiler.tagplugin.TagPluginContext;

public final class If implements TagPlugin {

	public void doTag(TagPluginContext ctxt) {
		String condV = ctxt.getTemporaryVariableName();
		ctxt.generateJavaSource("boolean " + condV + "=");
		ctxt.generateAttribute("test");
		ctxt.generateJavaSource(";");
		if (ctxt.isAttributeSpecified("var")) {
			String scope = "PageContext.PAGE_SCOPE";
			if (ctxt.isAttributeSpecified("scope")) {
				String scopeStr = ctxt.getConstantAttribute("scope");
				if ("request".equals(scopeStr)) {
					scope = "PageContext.REQUEST_SCOPE";
				} else if ("session".equals(scopeStr)) {
					scope = "PageContext.SESSION_SCOPE";
				} else if ("application".equals(scopeStr)) {
					scope = "PageContext.APPLICATION_SCOPE";
				}
			}
			ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
			ctxt.generateAttribute("var");
			ctxt.generateJavaSource(", new Boolean(" + condV + ")," + scope
					+ ");");
		}
		ctxt.generateJavaSource("if (" + condV + "){");
		ctxt.generateBody();
		ctxt.generateJavaSource("}");
	}
}
